package cn.edu.scau.cmi.qiuyaohua.client;

public class Adaptor_DC_15V extends DC_15V_{
    public String display(){
        AC_220V ac=new AC_220V();
        return ac.display_AC_220V()+caozuo2()+"这是15V直流电\n";
    }
    private String caozuo2(){
        return "这是降压操作\n";
    }
}
